Typing HM-11 Using computer, good points and bad points

I often get on computer now and days. I think good points of using on computer that I can practice speaking with it to my foreign friends. For example If I could, tried to download MSN messenger, and got microphone and web camera. So then we can see each other and talk in English/ Japanese. It is great practice for both of us and handy gadget for me. So I can do whatever I want with it. Also I can send and get some letter easily from so far who she is America. By the way, I'm not sure about bad points of using on computer but it sometimes made my eyes tired and being bloodshot when I use it for many hours. But it just at that time when I used it long and was all right in a few times.
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